coco2: update boot loader logic

Still need to sit down and test all of these

diff --git a/Kernel/platform-coco2/bootloader.s b/Kernel/platform-coco2/bootloader.s
index b2b64fd..ab0120b 100644 (file)
--- a/Kernel/platform-coco2/bootloader.s
+++ b/Kernel/platform-coco2/bootloader.s
@@ -27,8 +27,8 @@ copy:                                 ; Move the loader somewhere safe
 ;
 ;      Load IDE blocks 1+ into memory off an LBA drive. With 512 byte
 ; sectors we load just under 0xB000 bytes. The first 0x0000-0x8000 bytes are
-; our low memory image. 0x8000-0x8FFF holds the high image (0xF000-0xFFFF) and
-; then the blocks at 0x9000-0xAFFF are used for discard (0x8000-8FFF will be
+; our low memory image. 0x8000-0x93FF holds the high image (0xEC00-0xFFFF) and
+; then the blocks at 0xA000-0xBFFF are used for discard (0x8000-8FFF will be
 ; trashed before discard is gone by the exec arguments). Having done the
 ; shuffle we then jump in 64K mode to 0x0400 which is our start vector.
 ;
@@ -130,11 +130,11 @@ loaded:
                lda #'@'
                sta 0x0205
 ;
-;      We have loaded from 0000 to B000 now relocate bits from 8000-8FFF to
-;      F000-FFFF, 9000-B000 is discard space
+;      We have loaded from 0000 to B000 now relocate bits from 8000-93FF to
+;      EC00-FFFF, A000-B000 is discard space
 ;
                ldx #0x8000
-               ldy #0xF000
+               ldy #0xEC00
 l5:            ldd ,x++
                std ,y++
                cmpy #0xFF00            ; skip last 256 bytes (I/O area)